Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification
Chemical weathering is an integral part of both the rock and carbon cycles and is being affected by changes in land use, particularly as a result of agricultural practices such as tilling, mineral fertilization, or liming to adjust soil pH. These human activities have already altered the chemical te...
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Online Access: | https://epic.awi.de/id/eprint/32467/ https://epic.awi.de/id/eprint/32467/7/hartmann2013rg.pdf http://onlinelibrary.wiley.com/doi/10.1002/rog.20004/abstract https://hdl.handle.net/10013/epic.41047 https://hdl.handle.net/10013/epic.41047.d007 |
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ftawi:oai:epic.awi.de:32467 2024-09-15T18:28:01+00:00 Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification Hartmann, Jens West, A. Joshua Renforth, Phil Köhler, Peter De La Rocha, Christina L. Wolf-Gladrow, Dieter A. Dürr, Hans H. Scheffran, Jürgen 2013-06 application/pdf https://epic.awi.de/id/eprint/32467/ https://epic.awi.de/id/eprint/32467/7/hartmann2013rg.pdf http://onlinelibrary.wiley.com/doi/10.1002/rog.20004/abstract https://hdl.handle.net/10013/epic.41047 https://hdl.handle.net/10013/epic.41047.d007 unknown AGU https://epic.awi.de/id/eprint/32467/7/hartmann2013rg.pdf https://hdl.handle.net/10013/epic.41047.d007 Hartmann, J. , West, A. J. , Renforth, P. , Köhler, P. orcid:0000-0003-0904-8484 , De La Rocha, C. L. , Wolf-Gladrow, D. A. orcid:0000-0001-9531-8668 , Dürr, H. H. and Scheffran, J. (2013) Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification , Reviews of Geophysics, 51 (2), pp. 113-149 . doi:10.1002/rog.20004 <https://doi.org/10.1002/rog.20004> , hdl:10013/epic.41047 EPIC3Reviews of Geophysics, AGU, 51(2), pp. 113-149, ISSN: 1944-9208 Article isiRev 2013 ftawi https://doi.org/10.1002/rog.20004 2024-06-24T04:06:16Z Chemical weathering is an integral part of both the rock and carbon cycles and is being affected by changes in land use, particularly as a result of agricultural practices such as tilling, mineral fertilization, or liming to adjust soil pH. These human activities have already altered the chemical terrestrial cycles and land-ocean flux of major elements, although the extent remains difficult to quantify. When deployed on a grand scale, Enhanced Weathering (a form of mineral fertilization), the application of finely ground minerals over the land surface, could be used to remove CO2 from the atmosphere. The release of cations during the dissolution of such silicate minerals would convert dissolved CO2 to bicarbonate, increasing the alkalinity and pH of natural waters. Some products of mineral dissolution would precipitate in soils or taken up by ecosystems, but a significant portion would be transported to the coastal zone and the open ocean, where the increase in alkalinity would partially counteract “ocean acidification” associated with the current marked increase in atmospheric CO2. Other elements released during this mineral dissolution, like Si, P or K, could stimulate biological productivity, further helping to remove CO2 from the atmosphere. On land, the terrestrial carbon-pool would likely increase in response to Enhanced Weathering in areas where ecosystem growth rates are currently limited by one of the nutrients that would be released during mineral dissolution. In the ocean, the biological carbon pumps (which export organic matter and CaCO3 to the deep ocean) may be altered by the resulting influx of nutrients and alkalinity to the ocean. This review merges current interdisciplinary knowledge about Enhanced Weathering, the processes involved, and the applicability as well as some of the consequences and risks of applying the method. Article in Journal/Newspaper Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Reviews of Geophysics 51 2 113 149 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Chemical weathering is an integral part of both the rock and carbon cycles and is being affected by changes in land use, particularly as a result of agricultural practices such as tilling, mineral fertilization, or liming to adjust soil pH. These human activities have already altered the chemical terrestrial cycles and land-ocean flux of major elements, although the extent remains difficult to quantify. When deployed on a grand scale, Enhanced Weathering (a form of mineral fertilization), the application of finely ground minerals over the land surface, could be used to remove CO2 from the atmosphere. The release of cations during the dissolution of such silicate minerals would convert dissolved CO2 to bicarbonate, increasing the alkalinity and pH of natural waters. Some products of mineral dissolution would precipitate in soils or taken up by ecosystems, but a significant portion would be transported to the coastal zone and the open ocean, where the increase in alkalinity would partially counteract “ocean acidification” associated with the current marked increase in atmospheric CO2. Other elements released during this mineral dissolution, like Si, P or K, could stimulate biological productivity, further helping to remove CO2 from the atmosphere. On land, the terrestrial carbon-pool would likely increase in response to Enhanced Weathering in areas where ecosystem growth rates are currently limited by one of the nutrients that would be released during mineral dissolution. In the ocean, the biological carbon pumps (which export organic matter and CaCO3 to the deep ocean) may be altered by the resulting influx of nutrients and alkalinity to the ocean. This review merges current interdisciplinary knowledge about Enhanced Weathering, the processes involved, and the applicability as well as some of the consequences and risks of applying the method. |
format |
Article in Journal/Newspaper |
author |
Hartmann, Jens West, A. Joshua Renforth, Phil Köhler, Peter De La Rocha, Christina L. Wolf-Gladrow, Dieter A. Dürr, Hans H. Scheffran, Jürgen |
spellingShingle |
Hartmann, Jens West, A. Joshua Renforth, Phil Köhler, Peter De La Rocha, Christina L. Wolf-Gladrow, Dieter A. Dürr, Hans H. Scheffran, Jürgen Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification |
author_facet |
Hartmann, Jens West, A. Joshua Renforth, Phil Köhler, Peter De La Rocha, Christina L. Wolf-Gladrow, Dieter A. Dürr, Hans H. Scheffran, Jürgen |
author_sort |
Hartmann, Jens |
title |
Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification |
title_short |
Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification |
title_full |
Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification |
title_fullStr |
Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification |
title_full_unstemmed |
Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification |
title_sort |
enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification |
publisher |
AGU |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/32467/ https://epic.awi.de/id/eprint/32467/7/hartmann2013rg.pdf http://onlinelibrary.wiley.com/doi/10.1002/rog.20004/abstract https://hdl.handle.net/10013/epic.41047 https://hdl.handle.net/10013/epic.41047.d007 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
EPIC3Reviews of Geophysics, AGU, 51(2), pp. 113-149, ISSN: 1944-9208 |
op_relation |
https://epic.awi.de/id/eprint/32467/7/hartmann2013rg.pdf https://hdl.handle.net/10013/epic.41047.d007 Hartmann, J. , West, A. J. , Renforth, P. , Köhler, P. orcid:0000-0003-0904-8484 , De La Rocha, C. L. , Wolf-Gladrow, D. A. orcid:0000-0001-9531-8668 , Dürr, H. H. and Scheffran, J. (2013) Enhanced chemical weathering as a geoengineering strategy to reduce atmospheric carbon dioxide, supply nutrients, and mitigate ocean acidification , Reviews of Geophysics, 51 (2), pp. 113-149 . doi:10.1002/rog.20004 <https://doi.org/10.1002/rog.20004> , hdl:10013/epic.41047 |
op_doi |
https://doi.org/10.1002/rog.20004 |
container_title |
Reviews of Geophysics |
container_volume |
51 |
container_issue |
2 |
container_start_page |
113 |
op_container_end_page |
149 |
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1810469328136437760 |